Greentube Talks Flaming Devil and the Pull of the Classic Slot

Greentube's Richard Ganster talks with CasinoWow about Flaming Devil, the Devil Collect Feature, and where the studio's portfolio is heading this year.

Classic online slot themes have outlasted almost everything that was meant to replace them. Games with symbols like bells, sevens and bars are still filling lobbies at many real money online casinos, and the reason is simple. They're straightforward.

Flaming Devil is Greentube's take on that, a 243-ways-to-win slot released in August 2026. Classic symbols meet a mischievous Devil that collects every Coin prize on screen the moment it lands. Under the classic surface there are layers built for players who want more than a simple spin.

Greentube is Novomatic's digital division, behind classics like Sizzling Hot Deluxe and Book of Ra Deluxe.

To gain insights on the topic, we spoke with Richard Ganster, Director of Games Strategy and Games Portfolio Management at Greentube, in a Q&A shared with the studio's partners. We discussed the Devil Collect Feature, how the Free Games Wheel builds the multiplier and what the release says about the studio's direction. Here is what Ganster shared with us.

CasinoWow's interview with Richard Ganster of Greentube

CW: Flaming Devil features a classic slots theme. What was the inspiration for this choice?

RG: With Flaming Devil, we wanted to give players something instantly familiar but with a real spark of personality. Classic slot themes remain hugely popular because they strip everything back to what players love most: bold symbols, fast-paced action and big win potential. The devil character gave us a chance to inject some fun and mischief into that familiar format, and the fiery visual style ties the whole experience together. It's the kind of game that affiliates' audiences will recognise straight away, while still feeling fresh.

CW: Can you walk us through the Devil Collect Feature and what makes it different from similar collect mechanics in other titles?

RG: The Devil Collect Feature is really the heart of the game. Whenever a Devil symbol lands on the reels, it collects and awards every Coin prize currently on screen. It's a simple mechanic to understand, but it creates genuine anticipation on every single spin, since players are always watching for that Devil symbol to appear. What sets it apart is how it links directly into the Free Games Feature: collecting four Devil symbols during Free Games triggers the Free Games Wheel, so the base game collect mechanic and the bonus round are woven together rather than sitting as two separate systems.

CW: The Free Games Wheel adds an extra layer to the standard Free Games Feature. How does this change the way players approach the bonus round?

RG: It changes the mindset entirely. In a lot of Free Games features, players know roughly what to expect once the round is triggered. Here, landing four Devil symbols during Free Games awards a spin of the Free Games Wheel, which can add extra Free Games and increase the Free Games Multiplier. That multiplier then applies to all collected Devil symbol wins for the rest of the round, so every spin during Free Games carries the possibility of pushing the bonus even further. It keeps players engaged and chasing that next Devil symbol rather than just watching the round play out.

CW: The Free Games Wheel can trigger multiple times within a single Free Games round. How does this affect the game's volatility and win potential?

RG: That's where the real upside comes in. Because the Free Games Wheel can be awarded more than once in the same round, the Free Games Multiplier can stack up significantly, and the round itself can be extended well beyond its starting length. That gives Flaming Devil a strong ceiling on win potential while keeping the base game pace accessible. For affiliates, it's a great story to tell: the longer and luckier the Free Games run, the bigger the multiplier gets.

CW: With 243 ways to win, how does Flaming Devil compare to Greentube's other recent releases in terms of pace and player engagement?

RG: The 243 ways to win structure keeps the base game fast and rewarding, which is consistent with what we look for across our recent releases. What makes Flaming Devil stand out within that is the density of features hitting the reels: the Devil Collect Feature is active constantly, not just during Free Games, so there's always something happening even before the bonus round is triggered. It sits well alongside our other recent titles as a game built for that fast, feature-rich style of play that players and affiliates have come to expect from us.

CW: What kind of player is Flaming Devil best suited to?

RG: It's a great fit for players who enjoy classic slot theming but want more going on than a traditional format usually offers. The Devil Collect Feature gives casual and regular players frequent, easy-to-follow moments of excitement. In contrast, the stacking potential of the Free Games Wheel gives more engaged players a reason to chase bigger multipliers and extended rounds. It really bridges both audiences, which is exactly what we look for in this type of release.

CW: Looking ahead, how does Flaming Devil fit into Greentube's wider release strategy for the rest of the year?

RG: Flaming Devil is a strong example of the direction we're taking with our portfolio: familiar, accessible themes paired with layered, interconnected features that give players more reasons to stay engaged. As we move through the rest of the year, players can expect more titles that build on this approach, combining that instant, classic appeal with mechanics that reward longer sessions and bigger moments. Flaming Devil sets a strong tone for what's still to come.

What to make of Greentube's Flaming Devil

What shapes Flaming Devil is how much runs outside the bonus round. Where many online slots save the action for Free Games, the Devil Collect Feature works through the base game, and the Free Games Wheel can be awarded more than once in a round, with the multiplier building each time.

Ganster says the studio will keep to this approach, pairing familiar themes with features that connect to each other. Greentube has not published an RTP figure, a maximum win or a volatility rating for Flaming Devil yet, so there is more to learn about the game.

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Greentube talks Flaming Devil and the pull of the classic slot

CasinoWow's interview with Richard Ganster of Greentube